Effect of atmosphere packaging combined with ice-temperature on quality of raspberry

Experiment with different thickness of the PE bag packaging raspberries, and storaged in ice temperature conditions, it was conducted to investigate the effect of ice-temperature combined with modified atmosphere storage on quality of raspberry.Experimental results showed that, ice-temperature combined with modified atmosphere storage could increase the storage life of raspberries to 20d, and effectively slowed down the raspberry's titratable acid, soluble solids content decrease rate, when the titratable acid, TSS content of CK group decreased to 1.47%, 9.2% at 15d, the value of 0.04mm modified atmosphere packaging was 1.58%, 9.7% at 20d.But the effect of inhibit respiratory intensity, ethylene generation rate was not obvious difference.At the same time, modified atmosphere packaging increased peroxidase (POD) , catalase (CAT) activities and slowed down polyphenol oxidase (PPO) activity, it also decreased the MDA content permeability, so delayed ripening of raspberry.It showed that the optimum packaging of modified atmosphere for raspberry were 0.04mm PE bag.This showed that suitable atmosphere packaging combined with ice-temperature was more advantageous to the raspberry storage.